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Artykuły w czasopismach na temat "Aluminium – Composés – Propriétés électriques"
Morakchi, Karima, Abdellah Hamel, Ali Zazoua i Rochdi Kherrat. "Caractérisation par spectroscopie d’impédance électrochimique des inhibiteurs de corrosion destinés au circuit de refroidissement". Journal of Renewable Energies 11, nr 3 (30.09.2008). http://dx.doi.org/10.54966/jreen.v11i3.86.
Pełny tekst źródłaRozprawy doktorskie na temat "Aluminium – Composés – Propriétés électriques"
Pernot, Paul. "Élaboration et caractérisation de composés binaires et ternaires du graphite avec les chlorures métalliques : Corrélations entre structures et propriétés physiques". Nancy 1, 1989. http://www.theses.fr/1989NAN10236.
Pełny tekst źródłaTousch, Corentin. "Incorporation de nanotubes de carbone dans les couches d’oxyde formées par le procédé d’oxydation par plasma électrolytique de l’aluminium en vue d’élaborer des couches d’oxyde conductrices". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0282.
Pełny tekst źródłaThe most common method to enhance the surface properties of aluminum is acid-based anodization, forming a protective layer of aluminum oxide on the metal surfaces. This imparts improved wear and corrosion resistances due to alumina's high hardness and chemical stability. However, aluminum oxide is a strong electrical insulator, substantially increasing contact resistance in anodized components. Traditional electrolytic surface treatments involving nickel, cadmium, and chromium maintain electrical conductivity but involve heavy metal-containing electrolytes, including carcinogenic hexavalent chromium, a substance facing European Union import restrictions. Consequently, alternative treatments are sought, leading to electrolytic plasma oxidation. This electrochemical conversion process differs from acid anodization, using higher current/voltage and dilute basic electrolytes. The resulting oxide layer is porous, enabling the incorporation of solid particles. These particles are dispersed in the electrolyte and gradually incorporated within the growing oxide layer. By adding conductive particles it is conceivable to create percolation paths, forming a composite aluminum oxide-particle layer that protects the underlying aluminum while maintaining low electrical contact resistance.Carbon nanotubes were chosen for their excellent electrical conductivity and high form factor, enabling percolation at low volume concentration. The study aims at incorporating carbon nanotubes into the oxide layer generated during aluminum plasma electrolytic oxidation to produce conductive oxide layers. Experimental investigations establish fundamental insights into incorporation mechanisms, impact of electrical parameters, the influence of carbon nanotubes on the process, and coating properties, especially electrical behavior. Results reveal that carbon nanotubes accelerate layer growth and increase oxide coating porosity. High concentrations yield excessively porous layers with defects (cracks, delamination), compromising layer integrity. Carbon nanotubes in both the electrolyte and the growing oxide substantially affect the process. Transition to "soft" micro-discharge regime shifts earlier with higher nanotube concentrations under suitable electrical conditions. Excessive nanotube concentrations inhibit the process, preventing oxide layer formation. "Arc" regime treatments favor nanotube incorporation in the oxide compared to "soft" regime treatments. Although carbon nanotube incorporation significantly enhances oxide layer electrical conductivity, the percolation threshold isn't reached, and layers remain insulating for now. Despite this, the results are highly promising, prompting further research to optimize electrical conductivity in these composite coatings, building upon the findings reported here
Sakata, Hironobu. "Propriétés électriques et mécaniques de couches minces d'oxydes déposés sous vide". Bordeaux 1, 1986. http://www.theses.fr/1986BOR10530.
Pełny tekst źródłaBlanc-Mignon, Marie-Françoise. "Influence de la technologie de fabrication sur les propriétés électriques des structures capacitives MIS". Lyon, INSA, 1990. http://www.theses.fr/1990ISAL0068.
Pełny tekst źródła[The shrinkage of the VLSI circuits size, requires research in new gate and dielectric materials. The refractory metals and their silicides advantageous because of a higher conductivity than aluminium and polysilicon. The electrical characterization of tungsten and tungsten silicides gate MOS structures,allows to exhibit the influence of the technological deposition parameters : sputtering and post deposition annealing induce a diffusion of impurities in the oxide and at the interface deforming the capacitance voltage characteristics. The oxide nitridation yields a dielectric better adapted for the VLSI requirements than the simple oxidation of silicon(higher breakdown field impurities barrier). Electrical analysis (capacitance measurement Tunnelling and avalanche injection) ,of the plasma nitrated oxide MIS structure,gives the evolution as a function of the nitration time,of the trapping in the insulating volume and at the silicon insulating interface,as well as the traps characteristics. Plasma nitration improves the dielectric quality when the nitration time does not exceed one hour. Trapping in the volume is decrease and the interface degradation limited. ]
Porre, Olivier. "Etude de traitements à l'aluminium sur les propriétés électriques de plaquettes et de cellules solaires au silicium multicristallin". Aix-Marseille 3, 1994. http://www.theses.fr/1994AIX30064.
Pełny tekst źródłaBertheville, Bernard. "Propriétés électriques à fréquence variable de produits de décomposition d'une micelle de sulfonate de calcium. Etude corrélative d'oxydes de Ca et de Mg". Montpellier 2, 1993. http://www.theses.fr/1993MON20224.
Pełny tekst źródłaDebreuille-Gresse, Marie-Françoise. "Synthèse, structure et propriétés de composés du bismuth et d'anions phosphate ou vanadate". Lille 1, 1986. http://www.theses.fr/1986LIL10049.
Pełny tekst źródłaRenaut, Nicolas. "Amélioration des propriétés thermomécaniques et ignifuges du polypropylène : applications aux matériels électriques". Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10137/document.
Pełny tekst źródłaOur study deals with the processes used in order to improve the thermomechanical and fire retardant (FR) properties of polypropylene (PP) materials used in electrical equipments. The fIfst chapter concerns the improvement of the thermomechanical properties trough the development of polymer alloys. Bisphenol A polycarbonate (PC) is used as modifying polymer in the PP matrix. To improve the compatibilization of the polymer blends, two compatibilizing agents (AC) have been evaluated but the obtained properties are not sufficient and thus improvement of the properties was thus achieved using inorganic fillers. The second chapter is about the processes for imparting flame retardancy to PP materials reinforced by mineraI fillers (mica, talc or calcium carbonate). Two types of FR additives are tested: a phosphorous compound (APP: ammonium polyphosphate) used in intumescent systems and various brominated compounds. ln the case of the composite materials containing calcium carbonate, interactions between APP and fillers are evidenced and restrict the development of the protective thermally insulating structure (char) resulting in low FR properties whereas formulations with brominated compound present acceptable properties. However Br compounds present sorne environmental concerns. As a consequence, the last chapter deals with the processes that allow imparting flame retardancy to the PP composites surface. Before applying a FR protective paint, the materials are treated by low pressure radiofrequency cold plasma (O2, Ar, pure or mixture of them). By means of a global analysis of the topography, the surface chemical composition evolution and wettability, we propose sorne rearrangement mechanisms occurring at the PP matrix surface. We demonstrate that these mechanisms influence the adhesive properties of the treated materials and differ for each material as a function of the composition and nature of the fillers
Sassi, Zina. "Etude des spectres vibrationnels et des propriétés électriques des hexahydridoaluminates alcalins Li3AlHnD6-n n=(0,1,2,4,5,6) et de Na3AlH6". Lyon, INSA, 1988. http://www.theses.fr/1987ISAL0024.
Pełny tekst źródłaBouncer, Azzedine. "Caractérisation des contacts Schottky élaborés sur des couches de GaSb obtenues par épitaxie par jet moléculaire". Montpellier 2, 1993. http://www.theses.fr/1993MON20115.
Pełny tekst źródłaKsiążki na temat "Aluminium – Composés – Propriétés électriques"
François, Béguin, i Frackowiak Elzbieta, red. Carbons for electrochemical energy storage and conversion systems. Boca Raton: Taylor & Francis, 2010.
Znajdź pełny tekst źródłaBeguin, Francois. Carbons for Electrochemical Energy Storage and Conversion Systems. Taylor & Francis Group, 2010.
Znajdź pełny tekst źródłaBeguin, Francois, i Elzbieta Frackowiak. Carbons for Electrochemical Energy Storage and Conversion Systems. Taylor & Francis Group, 2009.
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